Bottom stop for separable fasteners and the method of producing the same



L. H. MORIN BOTTOM STOP FOR SEPARABLE FASTENERS AND THE METHOD OF PRODUCING THE SAME Feb. 23, 1943.

Filed Feb. 19, 1941 INVENTOR Lou/5 h. Mom/v j Patented Feb. 23, 1943 BOTTOM STOP FOR SEPARABLE FASTENERS AND THE METHOD OF PRODUCING THE SAME Louis B. Morin, Bronx, N. Y., asaignor, by meme assignments, of one-half to said Louis 11. Morin and one-half to Davis Marinsky, Bronx,

Application February 19, 1941,8etia1 No. 379,560

4 Claims.

This invention relates to separable fasteners employing stringers, and more particularly, the

invention relates to what are commonly referred to as bottom stops and the method of producing the same to unit the stringers of fasteners of the character described at one end thereof, and utilized to limit the travel of a slider along the stringers in the direction of said end, and further to permanently couple said ends of the stringers. The novel features of the invention will be best understood from the following description when taken together with the accompanying drawing in which certain embodiments of the invention are disclosed and in which the separate parts are designated by suitable reference characters in each of the views, and in which:

Fig. 1 is a perspective view of an end stop device made according to my invention diagrammatically illustrating the manner of placing the stringer tapes therein.

Fig. 2 is an end and sectional view through the device illustrating the method of securing the same to opposed stringers.

' Fig. 3 is a plan view of the end portion of the stringers with the device attached thereto.

Fig. 4 isan end view of a modified form of device in its normal unattached position; and,

Fig. 5 is a sectional view on the line 5-5 of Fig. 4.

In the construction of what are commonly referred to as separable fasteners employing stringers permanently united at one end by a bottom stop, difiiculty has been experienced not only in forming stop devices of this type and kind, but also in the attachment thereof to the stringer tapes in providing secure mounting of the devices on the tapes to prevent detachment from the tapes or movement longitudinally thereof. To avoid these objectionable features and difilculties, I have produced a simple and economical form of device and one which may be quickly and easily applied to the stringer tapes and then secured thereto in a simple manner without necessitating the use of special sized tools to suit the particular size of end stop employed. In this connection it is well to bear in mind that any sizes of fasteners; that is to say, where larger and smaller links are employed, the end stops are proportionately modified as to size, and thus it will appear distinctly advantageous to so construct these different size devices in a manner which will adapt the same to one type and kind of forming tools employed in securing the end stop devices to the stringer tapes.

In Figs. 1 to 3 inclusive I have shown one adaptation of the invention and the method of applying the end stop device to the stringer tapes. The device comprises a body it whlch roughly might be said to be an X-shaped body in cross section and comprises a central solid portion ii curved or channeled as seen at l2 at opposite surfaces. The side portions of the body II have laterally extending diverging plates l3 which extend from the central body II in even-thickness wall portions throughout the length of said walls except for slight outwardly extending enlarged ribs i l at the free end portions of said walls.

The spaced walls l3 form-longitudinal channels ii at each side of the end stop device l0,

which channels are substantially V-shaped in.

cross sectional form, and form a free entrance for the beaded edge portions I6 of the stringer tapes I! as will readily appear. The inner ends or base of the recesses l5 are rounded as seen at l8 to conform substantially to the contour of the beaded edges it.

In Figs. 1 to 3 inclusive, the wall portions of the channels l5 have inwardly extending V-shaped ribs l9 substantially centrally thereof to form key elements engaging the tapes to retain the end stop against shifting longitudinally thereof as will be apparent. The structure of Figs. 4 and 5 differs from that shown in Figs. 1 to 3 simply in substituting for the continuous ribs l9, knobs 20, 22, or projections, two of these projections 20 being arranged on one wall of the channels 2|, and a single projection 22 on the opposed wall thereof. As the structure of the end stop device shown in Figs. 4 and 5 is otherwise identical w th that shown in Figs. 1 to 3, no further detail description is required. The end stop devices are formed preferably from die cast bodies which may be metallic or plastic; and these bodies are cast in the positions noted in Figs. 1 and 4 of the drawing. As such, these bodies constitute articles of manufacture which may be shipped by the producer for use by manufacturers of separable fastener devices. In applying these devices to the beaded edges it of opposed stringer tapes II, the tapes are first arranged in the channels I5, 2| in the manner diagrammatically illustrated in Fig. 1 of the drawing, after which the same is placed in an anvil or press between two forming members 2324, one of which may be stationary and the other movable toward the first, or both of -ent,is:

pressure is applied upon the outer surfaces of the diverging walls or plates, the same are bent or re-shaped in a manner to bring the walls to gether around the beads i8 asseen at 25 in Fig. 2 of the drawing in securely retaining the and stop upon the tapes while leaving relatively flat surfaces 20 at the upper and lower surfaces of the side portions of the end stop. The result of this operation is clearly illustrated in Fig. 2 of the drawing. v It'will be apparent that the enlarged or outwardly extending portions I serve to displace the metal of the walls to form the projections 25 which may be said to be tucked around the beads ii of the tape in providing the secure attachment of the end stop to the tapes without in any way rupturing or otherwise injuring the tapes, thus: maintaining the strength thereof.

' may be moved toward each other. As

not shown. in one direction on the tapes, and

prevent complete separation of the tapes.

In the operation of bending orreshaping the end stop device from its normal open position as seen in liigs. 1 and 4 to the position illustrated inFig. 2, the uniform section of the walls or plates will result in a uniform bending or reshaping without danger of cracking or rupturing the walls, particularly in dealing with devices which are formed from die cast metal. vices are employed, these may'be heated sufficiently to facilitate the reshaping thereof, and if desired, a suitable cement may also be employed on the tape edges to further aid in retaining the device against displacement. 7

Having fully described myinvention, what I claim as new and desire to secure by Letters Pat- 1. As an article of manufacture, a device for forming an end stop coupling at one end of separable fastener stringers adjacentend links on the stringers. said device comprising a unitary body substantially, X-shaped in cross sectional projecting members on the we]. of the channeled portions of the device, and outer surfaces of said walls at free edges thereof having outwardly protruding longitudinal y extending rib P rtions.

2. The method of producingend stop and stringer tape'couplings for separable fasteners of theclass described, comprising, first forming a unitary body of substantial X-shaped cross sectional form to provide on opposed sides of the body longitudinal channels defined by opposed diverging walls with inwardly projecting elements on opposed surfaces of said walls and outwardly proiectingribs on the outer corner surfaces of said walls, then arranging the beaded edges of two opposed stringer tapes in the channels of said body adjacent end links on said beaded edges,

then applying pressure upon the diverging walls of said body to shape the walls around the beaded edges of the tapesand displacing the rib portions in forming inwardly projecting parts on inner surfaces of the wall portions tucked around the beads to retain the tapes against lateral displacement from said body and imbedding said projecting elements into the beaded edges to retain the body against longitudinal movement on said beaded edges.

3. As an article of manufacture, a device for forming an end stop coupling'at one end of separable iastener stringers adjacent end links on the stringers, said device comprising a unitary body substantially X-shaped in cross sectional form and comprising a central solid portion and pairs of oppositely diverging walls forming at opposite sides of the central portion channels substantially V-shaped in cross sectional form, the

- base of the channels being rounded, the outer sur- When plastic defaces of each of said walls at the free edges thereof having an outwardly protruding, longitudinally extending rib portion, and said walls being of substantially uniform thickness between said rib portions and said central solid portion.

4. As an article of manufacture, a device for forming anend stop coupling at one end of separable fastener stringers adjacent end links on the stringers, said device comprising a unitary body substantially X-shaped in cross sectional form and comprising a central solid portion and pairs of oppositely diverging walls forming at opposite sides of the central portion channels substantially V-shaped in cross sectional form, the

base of the channels being rounded, and outer surfaces of said walls at free edges thereof having outwardly protruding longitudinally extending rib portions.

LOUIS H. MORIN. 

